Cluster coupler in a time triggered network

A time-triggered protocol and coupler technology, applied in the field of cluster couplers, can solve problems such as increasing end-to-end path failures, and achieve the effect of reducing workload

Inactive Publication Date: 2009-08-19
NXP BV
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[0034] Figure 1 shows a network according to the invention. The cluster coupler 10 is connected to a plurality of clusters A, B, and X. FIG. The clusters have various topologies. Cluster A has a passive bus structure. In cluster B, nodes (not shown) are coupled through active star couplers, where the nodes are directly connected to the star couplers. In cluster X, the nodes are also coupled using star couplers, but in the structure of cluster X, a subnetwork of nodes coupled via a passive bus is connected to the star couplers. The active star coupler connecting the nodes in the cluster improves the signal quality on the communication line compared to the case where the nodes are connected by a passive bus. Active star couplers allow more nodes to be connected in a single cluster than in a passive bus. It also has the ability to disconnect failed nodes from the cluster to limit failure propagation through the cluster. A traditional star coupler works on a physical level, f...

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Abstract

The invention relates to a cluster coupler in a time triggered network for connecting clusters operating on the same protocol. Further, it relates to a triggered network having a plurality of clusters, which are coupled via the cluster coupler. It also relates to a method for communicating between different clusters. To provide a cluster coupling means, a network and a method for communicating between clusters which are able to couple a plurality of clusters operating on the same time triggered protocol to achieve a selectively forwarding of data without message buffering or frame delay a cluster cluster (10) in a network is proposed operating on a time triggered protocol using time slots, wherein the cluster coupler (10) is coupled to at least two clusters (A, B, X), a cluster includes at least one node (11), wherein the same protocol is used within the clusters, the cluster coupler (10) comprises: a protocol engine (12), a switch (20) and a switch control unit (21), wherein the switch control unit (21) includes an interconnection schedule indicating which input port of the switch (20) is connected to which output port of the switch (20) at a predetermined time slot.

Description

technical field [0001] The invention relates to a cluster coupler in a time-triggered network for connecting clusters operating on the same protocol. Furthermore, the invention relates to a trigger network having a plurality of clusters which are coupled via a cluster coupler. The invention also relates to a method for communicating between different clusters. Background technique [0002] Reliable automated communication networks rely on time-triggered communication protocols like TTP / C or FlexRay, which are based on broadcast methods according to predetermined TDMA schemes. A time-triggered protocol is proposed to distribute real-time communication systems used eg in the automotive industry. Such a communication protocol is described in "FlexRay—A Communication system for advanced automotive Control Systems" SEA World Congress 2001. In these systems, the medium access protocol is based on time-triggered multiplexing methods such as TDMA (Time Division Multiple Access) w...

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Application Information

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IPC IPC(8): H04L12/46H04L12/403H04L12/44
CPCH04L49/55H04L12/44H04L12/4625H04L12/403H04L2012/40241H04B7/212H04W72/12
Inventor 安德烈斯·瓦格宁根约恩·翁格曼
Owner NXP BV
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